Data transmitter/receiver modem



FIG. 1 is a top, front and left side perspective view of a data transmitter/receiver modem showing our new design;

FIG. 2 is a top, rear and right side perspective view thereof;

FIG. 3 is a front elevational view thereof.

The bottom is flat and unornamented. 

The ornamental design for a data transmitter/receiver modem, substantially as shown and described. 